Inking mechanism for plate-printing machines.



ACHWES.

` y 0.1053511. INKING MECHAMSM FOR PLATE PRINTING M APPLICATIN HLED NOV. l0. 1915.

Patented Jan. 15,1918.

OSCAR ROESEN, l'

NEW YORK, N. Y., ABSIGNOR T R. HOE AND C0., 0F NEW YORK,

N. Y., A COIJPOBATION 0F NEW YORK.

XING MECHANISM FOR PLATE-PRINTING MACHINES.

Bpeeication of Letters Patent.

Patented Jan. 15, 1918.

Application led November 10, 1915. Serial No. 60,654

To all whom it may concern:

Be it known'that l, OscAn Roman, a citizen of the United States, residing at New York city, county of Kings, ,and State of New York, have invented certain new and useful Im rovements in Inking Mechanism for Platerinting Machines, fully ldescribed and represented in the following use as long as 'and in the wipers.

specification and the accompanying drawings, formin a part of the same.

`his invention relates to certain im rovements in inking devices for plate mac ines. In plate printing machines, the printing is done from va flat plate or other surface means of depressed lines. To eiect printing by these plates the whole surface of the plate is first covered with ink,-so that the lines are eifectually lled. The surface of the plate, however, where there are no lines,l must be clean, and to efect this, the plate is wiped in some manner, usually an endless roll of cloth which is gradually renewed by suitable feeding mechanism. The ink used in plate rinting is expensive, and the wiping as or inarily done wastes the surplus ink which is ,wipedoih Furthermore, the wiping ofthe surplus ink causes a more rapid deterioration of the wiper than would be the case if the surplus ink were removed prior to wiping, are expensive it is desirable to keep them in p oible. i It is the object of this invention to provide a simple construction for use with plate printing machines in which all or the greater art of the surplus ink onthe surface of t e plate'is removed and delivered to a receptacle so that it can be used again,

thus effecting a considerable saving in ink For a full understandin of the invention reference may be had to t eaccompanying drawings, in which- Figure 1 is a side elevation of so much of a plate printing machine as is necessary for an understanding ofthe invention, show ing the device emp oyed for removing the su lus ink, and

ig. 2 is a plan view, partly in section, of the construction shown in Fig. l, the fi re being broken to economize space.

eferring now to these drawings, the invention is illustrated in connection with aplate printing machine employing flat plates and as thewipers 1 carried. on a suitable bed 2 which is reciprocated ln'any usual or desired manner. Inking devices of the usual form, including a fountain roll 3 and a distributer roll 4 suitably mounted in a frame 5, are provided for inking the plates. In constructions embodying the invention in its best form there will be provided ink removinp devices which shall act to remove ractica ly all the surplus ink from the surace of the plate and to deliver this ink to a receptacle so that the ink is saved and can be used over again. While these inkremov ing devices may be of various configuration, as shown there is provided a doctor or scraper 6 which is in the form of a thin blade extending across the machine and mounted to bear on the plate. This doctor blade iS mounted'in any suitable manner, and inthe particular construction illustrated a pair .of brackets 8, 9 are secured to the frame 5, beforereferred to, and to these ,brackets are pivoted arms 10, 11 which are connected by a crossbar 12 between which and a second cross-bar 13 the doctor blade 1s clamped. The pressure of the doctor on the plate is or may be regulated by springs (not shown) through spring rods 14 secured to the arms.

In accordance with the inventionV there is provided a receptacle for holding the surplus ink scraped or cleaned from the plate, and means whereby such cleaned or scraped ink is delivered by the doctor to the receptacle. While the means for effecting this may be varied, as illustrated the receptacle 1s in the form of a removable trough 15 removably secured to blocks 16 carried by the arms 8, 9,.before referred to. This receptacle is, as illustrated` provided with a forwardly extendin downwardl inclined, flange or lip 17, w 'ich extends a most to the rear side of the doctor, so that as the doctor cleans or scrapes the ink from the plate the ink Willbe forced u this inclined lip into thedreceptacle and tlius saved, to be again use Furthermore, in addition to saving the ink, the su lus'ink is substantially removed from the p ate before the late is acted on by the wipers` and but litt e, if any, ink is left for the wipers to remove, thus teffecting -a very considerable saving in the wipers.

While the invention has been shownand ioo.

described in its referred form2 it will be understood that c anges and varlations may be madein the construction shown and described without departing from they invention.

What is claimed is:

1. In a plate printing` machine the combination with a flat engraved platel a support there-for1 means for inking the plate, a pair 4of arms pivoted adjacent the support on each side thereof, means for adjusting the arms toward and from the support, clamping bars carried by the arms and extending across the face of the form a scraper comprising a flat blade clamped etween the bars bearing on the form for removing surplus ink therefrom, a receptacle carried by the arms for such ink, and a, guide extending' across the front of the receptacle substantially (so-extensive with and coperating with. the blade for delivering the scraped ink to the receptacle.

2. In a late printing machine the combination wit an engraved form, a, support for scribing witnesses.

' OSCAR ROESEN. Witnesses:

RICHARD KELLY, HAROLD M. TILLINGHABT. 

